<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

<el-card class="box-card">
    <el-button type="primary">添加角色</el-button>
    <!-- 角色列表区域 -->
    <el-table :data="rolelist" border stripe>
      <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
             <el-row :class="['bdbottom','vcenter',i1===0? 'bdtop':'']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
               <!-- 一级权限 -->
               <el-col :span="5">
                 <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                 <i class="el-icon-caret-right"></i>
               </el-col>
               <!-- 二级权限 -->
               <el-col :span="19">
                 <el-row :class="[i2===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                   <el-col :span="6">
                 <el-tag type="success" closable @close="removeRightById(scope.row,item1.id)">{{item2.authName}}</el-tag>
                 <i class="el-icon-caret-right"></i>

               </el-col>
               <el-col :span="18">
                 <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id"
                 closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
               </el-col>
                 </el-row>
               </el-col>
             </el-row>
            </template>
          </el-table-column>
      <el-table-column type="index"></el-table-column>
      <el-table-column label="角色名称" prop="roleName"></el-table-column>
      <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
      <el-table-column label="操作"  prop="level" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
      </el-table-column>

    </el-table>
</el-card>
<!-- 分配权限对话框 -->
<el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close=setRightDialogClosed>
  <!-- 树形控件 -->
 <el-tree :data="rightslist" :props="treeProps"  show-checkbox node-key="id" default-expand-all
 :default-checked-keys="defKeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible= false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      rolelist: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点id值数组
      defKeys: []
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败！')
      }
      // 获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)
      // 递归获取三级节点的Id
      this.getLeafKeys(role,
        this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的方式，获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败！')
      }
      this.$message.success('分配权限成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }

}
</script>

<style lang="less" scoped>
    .el-tag{
      margin: 7px;
    }
    .bdtop {
      border-top:1px solid #eee ;
    }
      .bdbottom {
      border-bottom:1px solid #eee ;
    }
    .vcenter{
      display: flex;
      align-items: center;
    }
</style>
